Tree
Risk
Assessment
Detailed Tree Risk Assessment Form
Client Information
Client
Date
Time
Address
Tree Location (Coordinates)
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Tree Location (Description)
Unique Tree Number / Code
Tree Species
dbh
Height
Crown Spread Dia.
Assessor(s) Name(s)
Assessor(s) Certification Number(s)
Risk Time Frame
Tools Used
Target Assessment
Target Number 1
Target Description
Target Zone
Target Within Drip Line
Select Option
Yes
No
Target Within 1 x Ht.
Select Option
Yes
No
Target Within 1.5 x Ht.
Select Option
Yes
No
Occupancy Rate
Select Option
Rare
Occasional
Frequent
Constant
Practical to Move Target?
Select Option
Yes
No
Restriction Practical?
Select Option
Yes
No
Target Number 2
Target Description
Target Zone
Target Within Drip Line
Select Option
Yes
No
Target Within 1 x Ht.
Select Option
Yes
No
Target Within 1.5 x Ht.
Select Option
Yes
No
Occupancy Rate
Select Option
Rare
Occasional
Frequent
Constant
Practical to Move Target?
Select Option
Yes
No
Restriction Practical?
Select Option
Yes
No
Target Number 3
Target Description
Target Zone
Target Within Drip Line
Select Option
Yes
No
Target Within 1 x Ht.
Select Option
Yes
No
Target Within 1.5 x Ht.
Select Option
Yes
No
Occupancy Rate
Select Option
Rare
Occasional
Frequent
Constant
Practical to Move Target?
Select Option
Yes
No
Restriction Practical?
Select Option
Yes
No
Target Number 4
Target Description
Target Zone
Target Within Drip Line
Select Option
Yes
No
Target Within 1 x Ht.
Select Option
Yes
No
Target Within 1.5 x Ht.
Select Option
Yes
No
Occupancy Rate
Select Option
Rare
Occasional
Frequent
Constant
Practical to Move Target?
Select Option
Yes
No
Restriction Practical?
Select Option
Yes
No
Site Factors
History of Failures
Topography
A (0-2%)
B (3-7%)
C (8-14%)
D (15-25%)
E (>25%)
Aspect
North
Northeast
East
Southeast
South
Southwest
West
Northwest
Site Changes
None
Grade Change
Site Clearing
Changed Soil Hydrology
Root Cuts
Soil Conditions
Limited Volume
Saturated
Shallow
Compacted
Pavement Over Roots
Soil Conditions Percentage (%)
Prevailing Wind Direction
Common Weather
Strong Winds
Ice
Snow
Heavy Rain
Notes
Notes
Tree Health and Species Profile
Vigor
Low
Normal
High
Foliage
None (seasonal)
None (dead)
Normal Percentage (%)
Chlorotic Percentage (%)
Necrotic Percentage (%)
Pest Problems
Abiotic Problems
Species Failure Profile
Branches
Trunk
Roots
Notes
Notes
Load Factors
Wind Exposure
Protected
Partial
Full
Wind Funneling
Relative Crown Size
Small
Medium
Large
Crown Density
Sparse
Normal
Dense
Interior Branches
Few
Normal
Dense
Vines / Mistletoe / Moss
Vines / Mistletoe / Moss
Recent or Planned Change in Load Factors
Notes
Notes
Tree Defects and Conditions Affecting the Likelihood of Failure
Select a Tree Defect to Enable Reporting
Crown and Branches
Trunk
Roots and Root Collar
Crown and Branches
Crown and Branches
Unbalanced Crown
LCR Percentage (%)
Dead Twigs / Branches
Overall Percentage (%)
Maximum Diameter
Broken / Hangers
Number of Broken Hangers
Maximum Diameter
Over-Extended Branches
Cracks
Lightning Damage
Co-dominant
Included Bark
Weak Attachments
Number of Cracks
Number of Co-dominants
Number of Weak Attachments
Cavity / Nest Hole
Previous Branch Failures
Similar Branches Present
Dead / Missing Bark
Cankers / Galls / Burls
Sapwood Damage / Decay
Conks
Heartwood Decay
Number of Previous Branch Failures
Response Growth
None
Some
A Lot
Pruning History
Crown Cleaned
Thinned
Raised
Reduced
Topped
Lion-Tailed
Flush Cuts
Other
Main Concern(s)
Main Concern(s) [separate each concern with a comma ","]
Load on Defect
N / A
Minor
Moderate
Significant
Likelihood of Failure
Improbable
Possible
Probable
Imminent
Notes
Notes
Trunk
Trunk
Dead / Missing Bark
Abnormal Bark Texture / Color
Co-dominant Stems
Included Bark
Cracks
Sapwood Damage / Decay
Cankers / Galls / Burls
Sap Ooze
Lightning Damage
Heartwood Decay
Conks / Mushrooms
Number of Cracks
Number of Co-dominants Stems
Cavity / Nest Hole % circ.
Depth
Poor Taper
Lean Degree
Corrected?
Response Growth
None
Some
A Lot
Main Concern(s)
Main Concern(s) [separate each concern with a comma ","]
Load on Defect
N / A
Minor
Moderate
Significant
Likelihood of Failure
Improbable
Possible
Probable
Imminent
Notes
Notes
Roots and Root Collar
Roots and Root Collar
Collar Buried / Not Visible
Depth
Stem Girdling
Dead
Decay
Conks / Mushrooms
Ooze
Cavity
Cavity % circ.
Cracks
Cut / Damaged Roots
Distance from Trunk
Root Plate Lifting
Soil Weakness
Number of Cracks
Response Growth
None
Some
A Lot
Main Concern(s)
Main Concern(s) [separate each concern with a comma ","]
Load on Defect
N / A
Minor
Moderate
Significant
Likelihood of Failure
Improbable
Possible
Probable
Imminent
Notes
Notes
Risk Categorization
Overall Tree Risk Rating
Low
Moderate
High
Extreme
Overall Residual Risk
Low
Moderate
High
Extreme
Work Priority
1
2
3
4
Recommended Inspection Interval
Data
Final
Preliminary
Advanced Assessment Needed
No
Yes
Inspection Limitations
None
Visibility
Access
Vines
Root Collar Buried
Notes
Notes
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